底部风口对高速列车设备舱通风特性的影响

Influence on Ventilation Characteristic of Bottom Vents under Equipment Cabin of High-speed Train

本文通过CFD(计算流体力学)方法研究了高速列车设备舱底板风口对设备的影响。文中分别对只开设裙板风口、只开设底板风口以及同时开设设备舱裙板与底板风口三种工况进行了数值模拟。对模拟结果进行分析,得到了底部压力分布规律,据此确定风口位置。同时对比分析了三种工况设备舱的通风量,研究表明只开底板时通风量最大;在同时开设底板与裙板风口时设备舱内温度分布较之单独开设裙板与底板风口时更均匀,且设备舱内部平均温度更低,并且辅助变流器表面温度比只开设裙底风口时降低了12%,设备舱散热性能得到明显提升。

In this paper,the influence of bottom vents under the equipment of high-speed train equipment is studied via CFD method.Three kinds of conditions in the paper were respectively simulated,i.e.vents on the apron plate,vents under the bottom plate as well as vents of both apron and bottom plate.Based on the analysis of the simulation results,the bottom pressure distribution was obtained and the optimal location of the vents was determined.Meanwhile,after comparing the ventilation volume of equipment cabin of three conditions,it turns out that vents opened under the bottom plate have the maximum ventilation volume.However,the temperature distribution of vents of both apron and bottom plate is more uniform than the other two conditions and average temperature inside the equipment is relatively lower.Surface temperature of the auxiliary convertor reduces by 12%when compared with the condition of vents on the apron plate.Heat dissipation performance of the whole equipment is thus significantly improved.